today i installed windows 10 in a vm and for some time the progress bar on the installer was stuck to 0%, i thought something is wrong and was about to press cross button but then at the last moment decided against it, thought i should wait for a few more moments.
all the sudden the progress counter changed to 100% and i learnt this lesson. had i pressed that button, i would have wasted quite some time as i am sure the next time it would have taken the same time, but the frustration would have built up. but "sometimes things take time" this shouldn't be used as an excuse for merging crappy code into master :). so be patient but not blind, blind to obvious problems.